KR20170037295A - Fixing jig for grinding square ejector pin - Google Patents

Fixing jig for grinding square ejector pin Download PDF

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Publication number
KR20170037295A
KR20170037295A KR1020150136691A KR20150136691A KR20170037295A KR 20170037295 A KR20170037295 A KR 20170037295A KR 1020150136691 A KR1020150136691 A KR 1020150136691A KR 20150136691 A KR20150136691 A KR 20150136691A KR 20170037295 A KR20170037295 A KR 20170037295A
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KR
South Korea
Prior art keywords
fixing
rectangular
fixing part
pin
support portion
Prior art date
Application number
KR1020150136691A
Other languages
Korean (ko)
Inventor
윤진만
Original Assignee
(주)신영프레시젼
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)신영프레시젼 filed Critical (주)신영프레시젼
Priority to KR1020150136691A priority Critical patent/KR20170037295A/en
Publication of KR20170037295A publication Critical patent/KR20170037295A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00—Other grinding machines or devices
    • B24B27/0046—Column grinding machines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The present invention relates to a fixing jig for square-millimeter polishing, comprising a base (51) supported on the floor or floor, a space (51) fixed to the base (51) A first fixing part 53 communicating with the space part 57 and forming an upper gap 59 for protruding one side edge of the rectangular square pinhole 18 disposed in the space part 57 upward, And a second fixing part 55 which is arranged to penetrate through the space part 57 and one end of which protrudes upward through the upper gap 59 to hold one end of the rectangular- And a support portion 61.
According to the present invention, it is possible to polish a square miter pin so as to have a correct fiducial amount and a fiducial angle according to the use of the mifin, and it is possible to polish the four corners of the square mip pin with the same fiducial amount irrespective of the skill of the operator.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fixing jig for square-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a fixing jig for square-millimeter polishing, and more particularly, to a fixing jig for square-millimeter polishing for facilitating a finishing operation of grinding the edges of a square-

The injection mold 10 molds and takes out the product while the fixed side 11 and the moving side move relative to each other. As shown in Fig. 1, the fixed side 11 and the moving side 13 And cores 15 and 17 forming corresponding cavities, respectively. The molten resin is injected into the cavity formed by the cores 15 and 17, and the resin is solidified by the high temperature and high pressure to complete the product K.

The finished product (K) is separated from the cores (15, 17) by means of the milfin (18, 19). The microns 18 and 19 are installed on a plate 21 driven by a separate power source and move together with the plate 21 to push out the product K from the cores 15 and 17.

In case of taking out the product K, in the case of the rectangular pinhole 18, the cores 15 and 17 and the pinhole pin 16 are pulled out from the cores 15 and 17, (L, m) of the mold 18 may cause trouble such as malfunction of the mold or product quality (product burr).

The reason that the cores 15 and 17 and the rectangular flutes 18 and 19 occur between the cores 15 and 17 is that the machining of the cores 15 and 17 proceeds to the wire processing machine, The corners are processed into an r shape (rounded shape), and the rectangular holes 18 and 19 are processed into a rectangular shape.

The rectangular flutes 18 at the present angle of the corners are used to polish the four corners of the square flutes 18 using a line or yarn 30 as shown in Figure 2, The worker grasps the four corners of the square spindle 18 by grasping the rectangular spindle 18 by hand and grinding the four edges of the square spindle 18 in a manner that the edge of the rectangular spindle 18 is brought into close contact with the grinding stone 40 .

However, since the present method is a manual operation depending on the operator's senses, the risk of a safety accident is high, and since the manual operation is performed, the amount of movement S varies depending on the operator.

If a quality deviation occurs at each of the four corners of the rectangular die pin 18, there is a clearance between the cores 15 and 17 and the rectangular die pin 18 as shown in the enlarged view of FIG. ), Burrs of the injection product occur between the tolerances (l, m), resulting in a product quality deficiency problem, and a time required for repairing and repairing the mold due to malfunction of the mold.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the problems of burr generation of an injection molding, which is a concern when a product is to be injected, by reducing the risk of the masonry work for polishing the corners of a square milling pin and minimizing the quality deviation of the square- And to provide a fixing jig for square-millimeter polishing capable of solving problems such as malfunctions.

According to an aspect of the present invention for achieving the above-described object, the present invention provides a method of manufacturing a microwave oven comprising a base supported on a floor or a floor, a space having a bottom surface fixed to the base, A first fixing part and a second fixing part communicating with the space and forming an upper gap for protruding one side edge of the rectangular flip fin disposed in the space part, and a first fixing part and a second fixing part arranged to penetrate the space part, And a support portion for holding one end of the rectangular flip-flops in a state of being projected upwardly.

An angle between the one surface of the first fixing part forming the space and the one surface of the second fixing part is 90 degrees and one surface of the first fixing part and one surface of the second fixing part are inclined with respect to the vertical center line The angle of inclination can be changed according to the angle of incidence (polishing angle) of the rectangular pin.

The first fixing part and the second fixing part are coupled to each other through a coupling unit to the body and a body fixed to the base. The first fixing part and the second fixing part form one surface of the first fixing part and one surface of the second fixing part, And a tip portion whose angle is 90 degrees.

The coupling means includes a screw hole formed in the body, and a thread portion protruding from the tip portion and coupled to the screw hole.

The support portion includes a first support portion that supports one side of the one end of the rectangular miter pin, the bottom surface of which is fixed to the base and one side of which is disposed to pass through the space portion, and a second support portion that is installed to be movable relative to the first support portion, A second support portion which is in contact with the first support portion and which pushes the other end of the first support portion in a direction in which the other end thereof is in contact with the first support portion, the second support portion being fastened through the first support portion and the second support portion, And fastening means for fixing a state in which the other side is in tight contact with the first support portion.

The first fixing part and the second fixing part are formed of a material which is not polished by the grinding stone.

In the present invention, one side edge of the rectangular flute is protruded upward through an upper gap formed between the first fixing portion and the second fixing portion so that only the protruding portion can accurately polish the grinding stone.

In addition, according to the present invention, one side of the first fixing part and one side of the second fixing part can be inclined at an angle with respect to the vertical center line according to the warp angle (polishing angle) of the square pin.

Therefore, it is possible to polish the square miter pin so as to have the correct firing angle and the miter angle according to the use of the miter pin, and it is possible to polish the four edges of the square miter pin with the same focal distance irrespective of the skill of the operator.

Therefore, it is possible to solve the problem of burr of the injection molding, the problem of the malfunction of the mold, etc., which are worried when the product is injected, and it is possible to prevent the safety accident of the worker because the worker does not have to grip the rectangular pin with the hand.

FIG. 1 is a view showing a general injection mold, and in FIG. 1, an enlarged view is a top view showing a state where a rectangular hole is arranged in a core processing hole of an injection mold and a tolerance is generated.
FIG. 2 is a view showing a state in which four corners of a square mill pin are polished using a line or a yam,
FIG. 3 is a view showing a state in which four corners of a square mill pin are polished with a grinding stone. FIG.
4 is a view showing a fixing jig for quadrangular milling according to a preferred embodiment of the present invention.
Fig. 5 is a view showing a state in which a warping angle (polishing angle) of a square mechin pin varies with replacement of a tip portion in Fig.
FIG. 6 is a partial front view showing an enlarged portion of a portion where the rectangular fluting is polished in FIG. 4; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4, the fixed jig for square-millimeter polishing according to the present invention comprises a base 51, a first fixing part 53 and a second fixing part 55, And a support portion 61.

The base 51 is formed in the shape of a rectangular plate having a predetermined thickness. The base 51 is for stably supporting the fixing jig 50 on the ground or the floor.

The base 51 has a predetermined weight so that the stationary jig 50 is prevented from being moved by the force of friction between the rectangular pinhole 18 and the grinding stone 40 during corner sharpening of the rectangular pinhole 18 using the grinding stone 40. [ .

The first fixing part 53 and the second fixing part 55 protrude upward only at the corner portion to be polished in the rectangular die pin 18 so that only the protruding portion can be polished by the grinding stone 40. [

The first fixing portion 53 and the second fixing portion 55 form a space portion 57 in which the bottom surface is fixed to the base 51 and cooperate with each other so that the rectangular shape pinhole 18 penetrates. The first fixing portion 53 and the second fixing portion 55 are formed in an upper gap (not shown) which communicates with the space portion 57 and protrudes one side edge of the rectangular square pin 18 disposed in the space portion 57 59 are formed.

The first fixing part 53 and the second fixing part 55 can be fixed to the base 51 with the fixing bolts 54 and 56 at the bottom face.

For example, when the bottom surfaces of the first fixing portion 53 and the second fixing portion 55 are in close contact with the base 51, the fastening holes of the first fixing portion 53 or the second fixing portion 55 The first fixing portion 53 and the second fixing portion 55 can be fixed to the base 51 by the fixing bolts 54 and 56 fastened to the fixing holes of the base 51 through the fixing bolts 54 and 56. [

The upper gap 59 is for projecting only the edge portion of the rectangular die pin 18 to be polished to the upper portion of the fixing jig 50. The corner of the rectangular die pin 18 protruding to the upper portion of the stationary jig 50 through the upper gap 59 is polished by the grinding stone 40 disposed on the upper side of the stationary jig 50. [

The grinding stone 40 can be positioned on the upper side of the fixing jig 50 by a moving means not shown and moved downward from the upper portion of the first fixing portion 53 and the upper portion of the second fixing portion 55, The corner portion of the rectangular spindle 18 protruding upward can be polished through the upper gap 59 of the first fixing portion 53 and the second fixing portion 55.

(Amount of polishing) of the corner of the rectangular pinhole 18 can be set and the four corners can be polished with the same imaginary amount.

The angle at which the one surface 53c of the first fixing portion 53 forming the space portion 57 meets the one surface 55c of the second fixing portion 55 is 90 degrees. This is because the one surface 53c of the first fixing portion 53 and the one surface 55c of the second fixing portion 55 come into close contact with the two adjacent surfaces of the rectangular pin 18 to stably support the rectangular pin 18 .

The inclined angle of the one surface 53c of the first fixing portion 53 and the one surface 55c of the second fixing portion 55 with respect to the vertical center line of the fixing jig 50 is determined by the angle Angle).

5 (a), one surface 53c of the first fixing portion 53 has an angle inclined by 70 degrees (alpha) with respect to the vertical center line of the fixing jig 50, One surface 55c of the second fixing portion 55 may be in contact with two neighboring surfaces of the square pinhole 18 at an angle inclined by 20 degrees with respect to the vertical center line.

5B, one surface 53c of the first fixing portion 53 has an angle inclined by 45 degrees (?) With respect to the vertical center line of the fixing jig 50, The one surface 55c of the fixing portion 55 can also be brought into close contact with the two neighboring surfaces of the rectangular pinhole 18 at an angle inclined by 45 degrees with respect to the vertical center line.

The corner of the rectangular pinhole 18 is bent along the angle of inclination of the one surface 53c of the first fixing portion 53 and the one surface 55c of the second fixing portion 55 with respect to the vertical center line of the fixing jig 50, Is changed.

The inclined angle of the one surface 53c of the first fixing portion 53 and the one surface 55c of the second fixing portion 55 with respect to the vertical center line of the fixing jig 50 is set such that the tip portions 53b, (53a, 55a).

Specifically, the first fixing part 53 and the second fixing part 55 are coupled to the bodies 53a and 55a and the bodies 53a and 55a, respectively, whose bottom faces are fixed to the base 51 via coupling means And tip portions 53b and 55b forming one side of the first fixing portion 53 and one side of the second fixing portion 55 and having an angle of 90 degrees with each other.

In this embodiment, the bodies 53a and 55a are formed in a rectangular shape when viewed from the front, and the tip portions 53b and 55b are formed in a triangular shape.

The engaging means includes a threaded hole a formed in the bodies 53a and 55a and a threaded portion b protruding from the tip portions 53b and 55b and coupled to the threaded hole a of the bodies 53a and 55a can do. In addition, a variety of examples can be applied as long as the engaging means allows the tip portions 53b and 55b to be replaced by the bodies 53a and 55a. For example, a press-fit hole is formed in the bodies 53a and 55a and a press-fit protrusion is formed in the tip portions 53b and 55b so that the press-fit protrusion of the tip portions 53b and 55b is fitted into the press- You may.

It is preferable that the first fixing part 53 and the second fixing part 55 are formed of a material which is not polished by the grinding stone 40. [ This is because the first fixing part 53 and the second fixing part 55 are formed in the process of polishing the edge of the rectangular flat pin 18 protruding into the upper gap 59 of the first fixing part 53 and the second fixing part 55, 55 are polished together.

The hardness of the first fixing portion 53 and the second fixing portion 55 must be higher than that of the grinding stone 40 so that only the corner portion of the rectangular fin pin 18 protruding into the upper gap 59 can be accurately polished.

The supporting portion 61 is disposed to penetrate through the space portion 57 and has one end supported by one end of the rectangular die pin 18 in a state that one side of the upper portion protrudes through the upper gap 59.

The support portion 61 includes a first support portion 63, a second support portion 65, and a fastening means 67.

The first support portion 63 supports one end of the rectangular spindle pin 18 whose bottom surface is fixed to the base 51 and whose one surface is arranged to pass through the space portion 57. The first support portion 63 can be fixed to the base 51 via the support bolt 64. [

The second support portion 65 is provided so as to be movable relative to the first support portion 63 and pushes the other end of the one end of the rectangular spindle 18 opposite to one end of the rectangular spindle 18 in the direction of tight contact with the first support portion 63 give. The second support portion 65 may move on a rail provided on the base 51 and be movable relative to the first support portion 63.

The fastening means 67 is fastened through the first support portion 63 and the second support portion 65 so that the second support portion 65 is brought into close contact with the other end of the rectangular pinhole 18 in the direction of the first support portion 63 The state can be fixed.

The fastening means 67 is fastened to the end of the fastening bolt that is inserted through the first support portion 63 and the second support portion 65 and the fastening bolt that penetrates the first support portion 63 and the second support portion 65 May be a fastening nut.

4, between a position where the first fixing portion 53 and the second fixing portion 55 are fixed to the base 51 and a position where the supporting portion 61 is fixed to the base 51, But the spacing between the two configurations may be further narrowed or arranged as needed.

The operation of the present invention will be described below.

The procedure for installing the rectangular pin on the fixing jig and polishing the corner of the square pin will be described.

First, the fringe amount and the firing angle of the corner of the rectangular die pin 18 to be polished are set.

5, the amount of displacement is set at the interval between the upper gap 59 between the first fixing portion 53 and the second fixing portion 55, 1 fixing portion 53 and one surface of the second fixing portion 55 meet.

The imaginary amount and the firing angle can be set to the shape or size of the tip portions 53b and 55b coupled to the bodies 53a and 55a.

The first fixing part 53 and the second fixing part 55 are formed by coupling the tips 53b and 55b to the bodies 53a and 55a and the first fixing part 53 and the second fixing part 55 are formed, And the second fixing portion 55 are fixed to the base 51 with the fixing bolts 54 and 56.

For example, as shown in FIG. 5 (a), the tip portions 53b and 55b are coupled to the bodies 53a and 55a so that the one surface 53c of the first fixing portion 53 is engaged with the fixing jig 50, And the one surface 55c of the second fixing portion 55 has an angle inclined by? (About 20) with respect to the vertical center line, The first fixing portion 53 and the second fixing portion 55 can be fixed to the base 51 by fastening the fixing bolts 54 and 56 to the base 51 after the first fixing portion 53 and the second fixing portion 55 are formed. have.

5b, the tips 53b and 55b are engaged with the bodies 53a and 55a so that the one surface 53c of the first fixing part 53 is engaged with the upper and lower surfaces of the fixing jig 50 The first fixing portion 53 has an angle tilted by about 45 degrees with respect to the center line and one surface 55c of the second fixing portion 55 has an angle tilted by about 45 degrees with respect to the vertical center line The first fixing portion 53 and the second fixing portion 55 are fixed to the base 51 by fastening the fixing bolts 54 and 56 to each other after the first fixing portion 53 and the second fixing portion 55 are formed.

5A and 5B show the shape of one side edge of the rectangular hole 18 protruding from the upper gap 59 formed by the first fixing portion 53 and the second fixing portion 55 is different So the angle of incidence is different.

5A, when the operation of fixing the first fixing part 53 and the second fixing part 55 to the base 51 is completed, the rectangular micon pin 18 is inserted into the space part 57 And one side edge thereof protrudes through the upper gap 59 to the upper portion of the first fixing portion 53 and the upper portion of the second fixing portion 55.

Next, the support portion 61 is fixed to one end of the rectangular spinning pin 18 extending rearward.

The first supporting portion 63 and the second supporting portion 65 are moved in the direction of the first supporting portion 63 so as to support the first supporting portion 63 and the second supporting portion 63, 2 supporting portion 65, so that the rectangular pin 18 can be closely contacted.

The second supporting portion 65 is moved in the direction of the first supporting portion 63 by the fastening means 67 so as to penetrate through the first supporting portion 63 and the second supporting portion 65, Thereby fixing the close contact state.

4, the position of the rectangular pinhole pin 18 is fixed, and the rectangular pinhole pin 55 protruded to the upper portion of the first fixing portion 53 and the second fixing portion 55 through the upper gap 59, One side edge of the grinding wheel 18 can be polished with the grinding stone 40.

6, by rotating the grinding stone 40 disposed above the first fixing portion 53 and the second fixing portion 55, the rectangular grinding stone 40, which is protruded upward through the upper gap 59, One side edge portion of the base 18 can be polished.

In this process, since the hardness of the first fixing portion 53 and the second fixing portion 55 is higher than that of the grinding stone 40, only the corner portion of the rectangular swinging pin 18 protruding through the upper gap 59 is accurately polished .

When the machining operation for polishing one side edge of the rectangular microfins 18 is completed through the above process, the remaining three edges of the rectangular microfins 18 may be polished by the same process as described above.

The use of the above-described fixing jig 50 allows the square-shaped turning pin 18 to be polished so as to have an accurate moving amount in accordance with the use of the turning pin. Thus, regardless of the skill of the worker, It is possible to solve the burr problem, which is a concern when the product is injected.

In addition, since the worker can perform the mopping operation without holding the square-shaped mip pin 18 by hand, the risk of the mopping operation can be reduced and the worker's safety accident can be prevented.

In addition, it saves work time and labor costs, which can contribute to production cost reduction.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

10: injection mold 11: fixed side
13: moving side 15, 17: core
K: Products 18,19: Milpin
21: Plate 30: Rows or Yasuri
40: Grinding stone 50: Fixing jig
51: base 53: first fixing portion
53a, 55a: body 53b, 55b:
a: screw hole b: thread
53c: one side of the first fixing part 55c: one side of the second fixing part
55: second fixing portion 57: space portion
59: upper gap 61:
63: first support portion 65: second support portion
67: fastening means

Claims (6)

A base supported on a floor or floor,
A first hollow portion having a bottom surface fixed to the base and cooperating with the rectangular molding pin so as to penetrate therethrough and an upper gap communicating with the space portion and forming an upper gap protruding from one side edge of the rectangular molding pin disposed in the space portion, The government and the second fixed government,
And a support portion disposed to penetrate the space portion and holding one end of the rectangular miter pin in a state that one side edge protrudes upward through the upper gap. The method according to claim 1,
An angle at which the one surface of the first fixing part forming the space part and the surface of the second fixing part meet is 90 degrees,
Wherein an angle at which one surface of the first fixing part and one surface of the second fixing part are inclined with respect to the vertical center line can be changed according to a warp angle (polishing angle) of the rectangular pin. . The method of claim 2,
The first fixing part and the second fixing part
A bottom surface of which is fixed to the base;
And a tip portion coupled to the body through a coupling means to form one surface of the first fixing portion and one surface of the second fixing portion and having an angle of 90 degrees with each other. The method of claim 3,
The coupling means includes a screw hole formed in the body,
And a screw portion protruding from the tip portion and coupled to the screw hole. The method according to claim 1,
The support
A first support part for supporting one end of the rectangular spindle, the bottom surface of which is fixed to the base and one surface of which is arranged to pass through the space part;
A second support portion provided to be relatively movable with respect to the first support portion and pushing the other end of the one end corresponding to the opposite direction of one end of the one end of the rectangular spin-
And a fastening means for fastening the second support portion through the first support portion and the second support portion so as to fix a state in which the other end of the one end of the rectangular mille pin is in close contact with the first support portion. Jig device. The method according to claim 1,
Wherein the first fixing part and the second fixing part are made of a material which is not polished by the grinding stone.
KR1020150136691A 2015-09-25 2015-09-25 Fixing jig for grinding square ejector pin KR20170037295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150136691A KR20170037295A (en) 2015-09-25 2015-09-25 Fixing jig for grinding square ejector pin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150136691A KR20170037295A (en) 2015-09-25 2015-09-25 Fixing jig for grinding square ejector pin

Publications (1)

Publication Number Publication Date
KR20170037295A true KR20170037295A (en) 2017-04-04

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KR1020150136691A KR20170037295A (en) 2015-09-25 2015-09-25 Fixing jig for grinding square ejector pin

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110355431A (en) * 2018-04-10 2019-10-22 广州市艺强电器有限公司 A kind of thimble helicla flute automatic grinding device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110355431A (en) * 2018-04-10 2019-10-22 广州市艺强电器有限公司 A kind of thimble helicla flute automatic grinding device
CN110355431B (en) * 2018-04-10 2024-04-26 广州市艺强电器有限公司 Automatic grinding device for thimble spiral groove

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